Browse Prior Art Database

TWO-FLUID DIRECT MODE PRINTING MASTER

IP.com Disclosure Number: IPCOM000024461D
Original Publication Date: 1980-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 69K

Publishing Venue

Xerox Disclosure Journal

Abstract

It is customary in commerical printing practice to use direct mode lithographic printing techniques for work having limited image quality requirements and to use offset mode lithography for work having the highest print quality requirements. Disclosed is a method of preparing a conformable two-fluid printing master capable of producing prints by direct lithographic procedures which are equal in quality to those customarily produced by the more complex offset lithographic procedures. A hydrophobic, conformable elastomeric film is rendered hydrophilic by the attach-ment of a thin surface layer of finely divided particles of, for example, aluminum, copper, and fumed silica. Such a surface also provides adhesive properties enabling the attachment of a variety of imaging materials such as, for example, xerographic toner, which are hydrophobic.

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XEROX DISCLOSURE JOURNAL

TWO-FLUID DIRECT MODE PRINTING MASTER U.S. C1. 101/130 Richard L. Schank

Proposed Classification

Int. Cl. B41f 7/00

It is customary in commerical printing practice to use direct mode lithographic printing techniques for work having limited image quality requirements and to use offset mode lithography for work having the highest print quality requirements. Disclosed is a method of preparing a conformable two-fluid printing master capable of producing prints by direct lithographic procedures which are equal in quality to those customarily produced by the more complex offset lithographic procedures. A hydrophobic, conformable elastomeric film is rendered hydrophilic by the attach- ment of a thin surface layer of finely divided particles of, for example, aluminum, copper, and fumed silica. Such a surface also provides adhesive properties enabling the attachment of a variety of imaging materials such as, for example, xerographic toner, which are hydrophobic.

An uncured elastomeric polymer film about 0.002 inches thick on a flexible substrate of, for example, paper or aluminum, is coated with a thin layer, for example, 0.1 - 2.0 microns, of a finely divided solid such as, for example, aluminum, copper and fumed silica. This film is then cured to an elastomeric state and thereby permanently bonding the particulate material to its surface. An image generated, for example, by xerography, magnetography or ultraviolet sensitive polymers, may now be...